Sudden cardiac death is a leading cause of fatality in the industrially developed world. Sudden infant death syndrome, has not hitherto been regarded as the same disease. However, the 55% reduction in the recorded rate of death from sudden infant death syndrome following the removal of stress-related problems caused by babies sleeping on their stomachs and overheating from tight and heavy clothing has, I propose, revealed that the babies may be dying from a similar stress-related cause, which can be prevented.